Solubilizing material and preparation method for PCE pollution repair in underground environment
A pollution repair and environmental technology, applied in the field of environmental engineering, can solve the problems of limited solubilization ability of solubilizing materials, inability to apply PCE, pollution repair, etc., achieve good promotion prospects, no high temperature and high pressure conditions, simple preparation effect
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Embodiment 1
[0038] Preparation of NSS-EO n -OH (n=7,10)
[0039] In the dry three-necked flask equipped with reflux condenser, constant pressure dropping funnel and magnetic stirrer, pass dry nitrogen gas for 10 minutes; add allyl polyether to the dry three-necked flask, dilute with isopropanol Chloroplatinic acid (Speier catalyst) or Karstedt platinum catalyst was used as a catalyst, and the temperature was raised to 80°C in an oil-bath magnetic stirrer. After activation for 30 minutes, the temperature was raised to 94°C; using a constant pressure funnel, gradually drop 1,1, 1,3,5,5,5-Heptamethyltrisiloxane undergoes hydrosilylation reaction, the reaction time is 2-3 hours; cool down and add 2% activated carbon to adsorb and precipitate platinum catalyst, remove color and suction filter; reduce pressure The solvent and low boilers (unreacted heptamethyltrisiloxane and allyl polyether) are distilled off to obtain a colorless transparent oily liquid NSS-EO n-OH (n=7,10). The molar ratio...
Embodiment 2
[0041] Take the colorless transparent oily liquid in Example 1, mix it with potassium bromide, grind it and press it into a tablet, and then do infrared spectrum measurement, wherein: trisiloxane polyoxyethylene ether 2250~2100cm -1 The stretching vibration absorption peak of Si-H disappears at 3392cm -1 At -OH stretching vibration absorption peak, 2872cm -1 at -CH 2 The stretching vibration absorption peak of the , 1646cm -1 at -CH=CH 2 Stretching vibration absorption peak of , 1107cm -1 The Si-O-Si vibration absorption peak at the place proves the synthesis of trisiloxane polyoxyethylene ether. Compliant with NSS-EO n The structural features of -OH, such as figure 1 shown.
Embodiment 3
[0043] Get product NSS-EO in embodiment 1 n -OH (n=7,10) configuration mass concentration is 0.05g / L, 0.1g / L, 0.2g / L, 0.3g / L, 0.4g / L, 0.5g / L, 1.0g / L, 2.0g / L, 3.0g / L, aqueous solution, measure the above NSS-EO n - Surface tension of OH (n=7,10) solutions to give NSS-EO 7 The critical micelle concentration (CMC) of -OH is 0.5g / L (8.7×10 -4 mol / L), the surface tension is about 22mN / m, and NSS-EO is obtained 10 The critical micelle concentration (CMC) of -OH is 0.4g / L (5.5×10- 4 mol / L), the surface tension is about 17mN / m such as figure 2 shown.
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